AP Photo/Carolyn Kaster
President Barack Obama and daughter Malia ride bicycles in Manuel F. Correllus State Forest in West Tisbury, on Martha's Vineyard, Mass., Aug. 23, 2011.
AP Photo/Carolyn Kaster
Sasha Obama, followed by her mother, first lady Michelle Obama, ride bicycles in Manuel F. Correllus State Forest in West Tisbury, on Martha's Vineyard, Mass., Aug. 23, 2011.
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President Barack Obama rides a bike in Manuel F. Correllus State Forest in West Tisbury, Mass., Aug. 23, 2011, during a family vacation to Martha's Vineyard.
AP Photo/Steven Senne
First Lady Michelle Obama prepares to dismount her bicycle along with her daughter Sasha Obama, foreground right, following a bike ride in Manuel F. Correllus State Forest in West Tisbury, Mass., on the island of Martha's Vineyard, Aug. 23, 2011.
AP Photo/Steven Senne
President Barack Obama, left, and his daughter Malia Obama, right, ride bicycles in Manuel F. Correllus State Forest, in West Tisbury, Mass., on the island of Martha's Vineyard, Aug. 23, 2011.
AP Photo/Steven Senne
First Lady Michelle Obama, center, and her daughter Sasha Obama, left, walk toward waiting vehicles, following a bicycle ride in Manuel F. Correllus State Forest in West Tisbury, Mass., on the island of Martha's Vineyard, Aug. 23, 2011.
AP Photo/Steven Senne
President Barack Obama, right, smiles while driving a golf cart with businessman Vernon Jordan, behind, as the two play golf at Farm Neck Golf Club, in Oak Bluffs, Mass., on the island of Martha's Vineyard, Aug. 23, 2011.
AP Photo/Steven Senne
President Barack Obama, left, prepares to putt as businessman Vernon Jordan, right, watches while playing golf at Farm Neck Golf Club, in Oak Bluffs, Mass., on the island of Martha's Vineyard, Aug. 23, 2011.
Carolyn Kaster
President Barack Obama, center, plays golf with with Eric Whitaker, left and Marvin Nicholson, Aug. 23, 2011, at Farm Neck Golf Club in Oak Bluffs, on Martha's Vineyard, Mass.
AP Photo/Carolyn Kaster
President Barack Obama, second from left, plays golf with, from left, Vernon Jordan, Marvin Nicholson and Eric Whitaker, Aug. 23, 2011, at Farm Neck Golf Club in Oak Bluffs, on Martha's Vineyard, Mass.
AP Photo/Carolyn Kaster
President Barack Obama, left, walks with Eric Whitaker as they plays golf, Aug. 23, 2011, at Farm Neck Golf Club in Oak Bluffs., on Martha's Vineyard, Mass.
JIM WATSON/AFP/Getty Images
President Barack Obama speaks about Libya to the press at Fisher House on Blue Heron Farm in Chilmark, Mass., on Aug. 22, 2011.
AP Photo/Carolyn Kaster
President Barack Obama and first lady Michelle Obama leave Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama orders at the takeout window at Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama orders at the takeout window at Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
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President Barack Obama and first lady Michelle Obama leave Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama and first lady Michelle Obama leave Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama walks into Nancy's Restaurant with his daughter Malia Obama in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama turns after greeting people gathered outside Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
President Barack Obama greets people gathered outside Nancy's Restaurant in Oak Bluffs on Martha's Vineyard, Mass., Aug. 21, 2011, during a family vacation.
AP Photo/Carolyn Kaster
A motorcade vehicle with President Barack Obama and first lady Michelle Obama, right, aboard, passes the Blue Heron Farm in Chilmark on Martha's Vineyard, Mass., en route to a beach in Edgartown, Mass., with their daughters, not shown, Aug. 21, 2011.
AP Photo/Steven Senne
President Barack Obama, right, speaks with an unidentified man, left, while playing golf at the Vineyard Golf Club in Edgartown, Mass., on Martha's Vineyard, Aug. 21, 2011. Obama is vacationing on the island with his family during the last half of August.
AP Photo/Steven Senne
President Barack Obama prepares to putt while playing golf as a photographer, left, looks on at the Vineyard Golf Club, in Edgartown, Mass., on Martha's Vineyard, Aug. 21, 2011. Obama is vacationing on the island with his family during the last half of August.
AP Photo/Steven Senne
Members of law enforcement sit in a small vehicle along the fairway of the Vineyard Golf Club moments before the arrival of President Barack Obama during a golf game, in Edgartown, Mass., on Martha's Vineyard, Aug. 21, 2011. Obama is vacationing on the island with his family during the last half of August.
AP Photo/Carolyn Kaster
A motorcade transporting President Barack Obama and his senior advisor Valerie Jarrett moves from Blue Heron Farm in Chilmark, Mass. to a social event at the home of Professor Charles Ogletree, the president's friend and former law school professor, in Oak Bluffs on Martha's Vineyard, Mass., Aug. 20, 2011.
JIM WATSON/AFP/Getty Images
President Barack Obama, center, departs a book store with his daughters Malia Obama, right, and Sasha Obama, second right, in Vineyard Haven, Mass., on Martha's Vineyard, Aug. 19, 2011.
AP Photo/Steven Senne
President Barack Obama, left, waves as he departs a book store with his daughters Malia Obama, right, and Sasha Obama, partially obscured behind center, in Vineyard Haven, Mass., on Martha's Vineyard, Aug. 19, 2011.
AP Photo/Carolyn Kaster
A crowd gathers hoping to see President Barack Obama leave the Bunch of Grapes book store in Vineyard Haven, Mass., Aug. 19, 2011, during a family vacation.
AP Photo/Carolyn Kaster
A crowd gathers hoping to see President Barack Obama leave the Bunch of Grapes book store in Vineyard Haven, Mass., Aug. 19, 2011, during a family vacation.
AP Photo/Steven Senne
President Barack Obama tees off while playing golf at the Vineyard Golf Club in Edgartown, Mass., on Martha's Vineyard, Aug. 19, 2011. Obama is vacationing on the island with his family during the last half of August.
AP Photo/Steven Senne
President Barack Obama places the ball before teeing off while playing golf at the Vineyard Golf Club in Edgartown, Mass., on Martha's Vineyard, Aug. 19, 2011. Obama is vacationing on the island with his family during the last half of August.